When your eyes are in a dark room, they get used to the darkness. But when you walk outside into bright light, your eyes have to change quickly so you can see clearly again. Your pupils, which are like tiny doors inside your eyes, shrink to let less light come in. This helps protect your eyes from getting too bright and keeps everything clear.
Examples
- Your pupils are like adjustable doors that open wide in the dark but narrow down when it's bright.
- Squinting is your body’s way of telling your eyes they need help blocking out too much light.
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See also
- How Do Birds Migrate So Far?
- What Causes Hiccups?
- How Can a Single Seed Grow into a Tree?
- Why Do People Have Different Shapes of Faces?
- Why Do We Blink?
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Categories: Biology · eye anatomy,light adaptation,visual perception